Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8074722 | Method for securing a damaged wellhead | John M. Murphy, Sigifredo Alvarado | 2011-12-13 |
| 4905781 | Water skate | Robert R. Henvest | 1990-03-06 |
| 4821829 | Air cushion vehicle | Robert R. Henvest | 1989-04-18 |